Transformer Theory Quiz questions
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Free Online Quiz test transformer theory and practice.
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Question 1 of 10
1. Question
1 pointsWhat happens when a DC supply is supplied to Primary of a transformer?
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Question 2 of 10
2. Question
1 pointsA transformer has an efficiency of 90% which works at 120 V, 3.6 kW. If the secondary voltage is 240 Volts, what is the primary current?
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Question 3 of 10
3. Question
1 pointsA transformer having 1500 turns in primary winding 300 turns in secondary winding is supplied with 120 volts AC. What is its secondary Voltage?
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24 Volts
Solution:
secondary Voltage = turns ration * primary Voltage
= 300 / 1500 * 120 = 24 volts -
Question 4 of 10
4. Question
1 pointsA three-phase 4 wire electrical system phase-phase voltage is 480 volts. what is its phase to neutral voltage?
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277 volts
Solution:
480 / √3 = 277 Volts -
Question 5 of 10
5. Question
1 pointsThe Scott connection is used to change three phase power into two phase power.
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Question 6 of 10
6. Question
1 pointsWhat is the phase angle between primary and secondary of a transformer?
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Question 7 of 10
7. Question
1 pointsThe ampere current in primary side of a transformer is directly proportional to ampere current in secondary.
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Question 8 of 10
8. Question
1 pointsWhat is the best way to connect to single phase transformers to act as three phase transformer?
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Question 9 of 10
9. Question
1 pointsTransformer is laminated to reduce …………………
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Question 10 of 10
10. Question
1 pointsThe Transformer is not used in DC Power supply system because
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